/Engine/Source/Runtime/VulkanRHI/Public/VulkanDynamicRHI.h
Only relevant with an RHI thread, this advances the backbuffer for the purpose of GetViewportBackBuffer FlushType: Thread safe
virtual void RHIAdvanceFrameForGetViewportBackBuffer ( [FRHIViewport](API\Runtime\RHI\FRHIViewport) * Viewport )